Hello, I am trying to run the Magni on Ubuntu 16.04 and Gazebo 7. I have followed the directions outlined here: https://learn.ubiquityrobotics.com/simulation and am able to spawn the Magni in an empty world. However when I attempt to run a demo and input the command
roslaunch magni_demos simple_navigation.launch I get the following error:
How can I fix this and launch the navigation demo?